Add thumbnails to the Impulse theme on mobile

gistfile1.txt

        this.destroyImageCarousels();
        
        
        if (!theme.config.bpSmall) {
          this.$mainSlider.slick(args.main);
          this.$thumbSlider.slick(args.thumbs);
        } else if (theme.config.bpSmall){
          
          var thumbArrows = this.settings.thumbArrows = this.$thumbSlider.data('arrows');
          const asNavFor = this.selectors.mainSlider;
          
          
          this.$mainSlider.slick({
          	asNavFor: this.selectors.thumbSlider,
            adaptiveHeight: true,
            dots: false,
            infinite: false,
            fade: true
          });
          
          
          this.$thumbSlider.slick({
            asNavFor: this.selectors.mainSlider,
            slidesToShow: 3,
            slidesToScroll: 1,
            arrows: true,
            dots: false,
            focusOnSelect: true,
            infinite: false,
            customSlideAdvancement: true
          })
        }

        this.settings.slickMainInitialized = true;